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List: cfrg
Subject: [Cfrg] I-D Action: draft-irtf-cfrg-pairing-friendly-curves-04.txt
From: internet-drafts () ietf ! org
Date: 2020-04-28 11:19:11
Message-ID: 158807275110.30968.7143445908199241552 () ietfa ! amsl ! com
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Crypto Forum RG of the IRTF.
Title : Pairing-Friendly Curves
Authors : Yumi Sakemi
Tetsutaro Kobayashi
Tsunekazu Saito
Filename : draft-irtf-cfrg-pairing-friendly-curves-04.txt
Pages : 44
Date : 2020-04-28
Abstract:
Pairing-based cryptography, a variant of elliptic curve cryptography,
has received attention for its flexible and applicable functionality.
Pairing is a special map defined over elliptic curves and it can be
applied to construct several cryptographic protocols such as
identity-based encryption, attribute-based encryption, and so on. At
CRYPTO 2016, Kim and Barbulescu proposed an efficient number field
sieve algorithm named exTNFS for the discrete logarithm problem in a
finite field. Several types of pairing-friendly curves such as
Barreto-Naehrig curves are affected by the attack. In particular, a
Barreto-Naehrig curve with a 254-bit characteristic was adopted by a
lot of cryptographic libraries as a parameter of 128-bit security,
however, it ensures no more than a 100-bit security level due to the
effect of the attack. In this memo, we summarize the adoption status
of pairing-friendly curves in standards, libraries and applications,
and classify them in 128-bit, 192-bit, and 256-bit security levels.
Then, from the viewpoints of "security" and "widely use", we select
the recommended pairing-friendly curves considering exTNFS.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-irtf-cfrg-pairing-friendly-curves/
There are also htmlized versions available at:
https://tools.ietf.org/html/draft-irtf-cfrg-pairing-friendly-curves-04
https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-pairing-friendly-curves-04
A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-irtf-cfrg-pairing-friendly-curves-04
Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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